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Patented Aug. 2, i898.

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? M .GMMQ I 1W/afhangt UNITED STATES PATENT Current.

NE1L w. McIN'rosn, oF NEW Youn, n. r.

ROTARY BLOWERQ SPECIFICATION formingr Dart of Letters PaterigNo. 608.377, dated August 2. 189B., Application led August r341, 1897. Slellal-ll'e.l 649,058. (No mrulclh To (LN, lli/mnt L may concern:

llo it known that I, NEIL W". MCINTOSH, of New York, in the county of New York and State otNew York, have invented certain new anduseful Improvements in Rotaryllowers; and l do hereby declare the following to be a full, clear, and exact description oi the same, reference being had to the accompanying drawings, forming a part oi. this speciiieation, and l o l he letters ot' 'reference marked thereon.

This invention relates'to improven'icnts in appa ratus l'or creati ng a draft of air, and more especially such as are designed for supplying,r air and moisture to steam-boiler furnaces or furnaces of a like nature; and -the invention consists in certain novel features of construetion and combinations and arrangements of parts,- all aswill be now pointed out, and described particularly in the appended claims.

.Referring to the accompanying drawings, Figure 1 is a section Ytaken longitudinally through a shaft and` blower embodying my present invention. Fig. 2 is a section, taken at right angles to Fig. l, throughthe radial arms and vanos ofthe blowen Like-lettcrspf reference in both iigures indicate the saine parts. l In carrying`myinventiominto practice I l-make use of amoer constructed on the princi plc of what is known as a F reaetion-cngin e,

or, in other words, an engine in whiehthe propelling power is obtainedgby discharging jietmof steam or other lluid from radial arms 'through apertures pointed 'in the direction eontraryrto the direction ot' rotation of the motor. Upon this react ionary motor I mount a series of inclined vanes or paddles of any approved form, which by their rotation drive the air in one direction or the other in aeeordance with well-known principles, and. in order that the action of the motive fluid may not counteract the effect of the-vanos in propelling; air forwardly'thc.passage ofthe motivo lluid through the ilischarge-apertnres is linterrupted or `arrested save throughout a small proportion ol' the circumference of the device.

ln said drawing.; the letter A indicates aA tubular shalt or pi pe, preferably mounted iu fixed supports,'so as to be ineal'iable ot rotation and connected at one end with a source of pressurelsnpply, such as a slertm-lmileig' and having its opposite end closed by a plusl 'radial a'rms are letterei D, each beineY preferably made tubular and' screwing into the hub ll in such position that its central aperture will register vwith correspondiim` apertures c in the hub. f' The arms l) may behold or locked rigidly in position by set-nuts d,-

and each is provided with an aperture orany desired number ol' apertures l?, opening,` in a backward direction or in :1 direction contrary to the direi-lion iu which it is desired the blower shall rotate. Upon these radial arms D,ll also mount inclined vanos or propellerblades (i, the said blades being preferably lo cated on the front side of the arms or in Such position that the discharge of the steam or motive fluid shall take place behind them.

, In the upper side of the shaft A and in position to register withthe passages e I form a port or slot H,thc length of which determines the number of radial arms which shall take steam or into ,which the motive lluid shall flow at any one time'. Thus in the structure shown, as the h'nb rotates, the passages e are successively .brought into registry with the port, and the port is of such length'that but i' three arms are Iin registry at any one time, the remaining arms during the balance et' their rotation being allowed to exhaust or discharge their confined steam without opposing the passage of the air through the propeller or blower.

Obviously the length ot the port Il maybe varied without departing,r from the spirit ot my invention; but I prefer that it should lie-- oii sufficient length only to supply the radial 'arms with motivo il uid throughout a small pro;

'portion of their revolution, say ouenuarler.

If desired, a hood or annular guard, such as K, may be employed to inelose the blower and direct the blast to any desired point, and where the shaft A is a Iixed snalt this hood maybe supp 'nl'.ed by radial arms, such as la, secured to thc shaft by a hub it" or other wellknown structure.

Where the blower is used for the purpose of su} plying air to a furnace, it will be seen that the steam.l which in this instance should radial arms after form tho motive fiuid, at once supplies mois ture and obviates the neeessibyof employing a speciali means to moisten tiile air, more espeeiaiiy as time steam discharged through the having lost its force is caught by the vanos au carried on with the air and thoroughly eommingled therewith.

Having lius esoribed inyinvention, what ela-im new isl. u a blower, Jdie oouibii'iaiion wiiili the tubular shaft held against rotation and having an oxii-port ai; orio side thereof, of a hub jourowed on said shaft and iuelosing tho exitport, a series of radial propelling- Vance mouiiied ou said hub and passages having rearward discharges arranged limgitudiualiy o?? said arms and passing through die hub iuio position lo register with die port in Ille ltubular shaft when brought into lino llere- 'wifii by the roiatiou o1" the hul), whereby the discharge Llirouglieach oi' the radial passages in he vanos is limited to a portion of the rovoiuiii'iu of the hub; substantially as described.

In a blower llio com binatiou with the fixed shaft, hub mounted thereon, motive-liuid passages through said shaft and hub YiLli means l'or cutting oi the supply of motivo ll uid on one side of the shal, of radial arms mounted in said hub and having passages registering with tho passages in the hub and baekwardly direct the discharge-Openings and propeller vanos or blades mounted on said radial arms in front of the diseliargo-openiugs; substan- Lially described.

NEIL YV. MClN"OSll. 

